Request to close UC Claim denied

Dear advisors,

Due to personal commitment to travel abroad for longer than 4 weeks, I have requested to close my UC claim and chosen the option Others. Under this option " Others " I explained the reason as my abscence abroad for longer period it does not qualify me for UC, I requested my claim to be closed without negative impact on my future claim when I return to UK. I was surprised, the following day, they send me an email asking me to log in and respond to a review and to provide a share link for my ID. I noticed my UC was not closed although my work coach has left me a message in journal to agree on closure but was not closed.
How long does it take for Universal Credit claim to be closed this way.
Why they suddenly opened acnew investigation for my ID which I have already responded to it last month.
Is there a quicker way to close Universal Credit Claim.
Thank you

I have tried many times to close my UC claim but was denied. I have chosen reason as OTHER category and left note that I no longer qualify for UC because I need to travel abroad. No reason given why still my account open. I have called UC help centre and explained that I need to travel abroad for over 2 months and will open new account when I return. They have sent a message to action team requesting to close account. Last month, I sent another Journal message asking for your claim to be closed immediately. This time have chosen the option A Payment. No response from Case Manager so I thought at last, they closed my account.
Today I found email from saying "You need to do something for your Universal Credit. Sign in to your online Universal Credit account today and check your to-do list."
I decided to ignore it.. Do you think by doing so, they will close my account ? This issue has been going on for 3 months

Thanks David. I have already followed your advice before by leaving a message in journal to my coach in A Payment category. He did not take a notice. I am unable to carry on chasing them again and beging to close my account because I cant remember user name and password which was .automatically printed in my laptop. I am abroad now and my laptop left it in my home in UK.
What do you think is going to happen if I do not respond to their recent message.?